EP0535504B1 - Procédé et appareillage pour le transfert d'image sur des surfaces enduites - Google Patents

Procédé et appareillage pour le transfert d'image sur des surfaces enduites Download PDF

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Publication number
EP0535504B1
EP0535504B1 EP92116174A EP92116174A EP0535504B1 EP 0535504 B1 EP0535504 B1 EP 0535504B1 EP 92116174 A EP92116174 A EP 92116174A EP 92116174 A EP92116174 A EP 92116174A EP 0535504 B1 EP0535504 B1 EP 0535504B1
Authority
EP
European Patent Office
Prior art keywords
fact
polymer layer
station
low molecular
transfer medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92116174A
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German (de)
English (en)
Other versions
EP0535504A1 (fr
Inventor
Jürgen Dr. Kramer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KRAMER, JUERGEN, DR.
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Individual
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Publication of EP0535504A1 publication Critical patent/EP0535504A1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D06P5/001—Special chemical aspects of printing textile materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5209—Coatings prepared by radiation-curing, e.g. using photopolymerisable compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0027—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or layers by lamination or by fusion of the coatings or layers

Definitions

  • the method relates to a method for Image transfer to coated surfaces, in particular those of wood-based materials, the surface with coated with a hardenable polymer layer and the Polymer layer under the influence of heat with a color pigment carrying transfer medium is brought into intimate contact. Furthermore, an apparatus for performing the method described.
  • wood-based materials are in this Connection, for example, chipboard with or without veneer or primer, medium density fibreboard, plywood and to understand any solid wood parts.
  • a method of the type described above is known from the Article "The Reproprint Process” (wood and furniture industry, DRW-Verlag, Stuttgart edition 1/88, pages 83 to 85) known.
  • the surface is first in solvent dissolved polymers, i.e. coated with a varnish. This paint is dried, with the applied polymer layer hardens. Then a printed paper as Transfer medium placed on the hardened polymer layer.
  • a press for example a vacuum press, a Calender, a cycle press or a double belt press can, there is an intimate contact between the transfer medium and the polymer layer and the transfer medium warmed up. In doing so, they sublime onto the transfer medium applied color pigments from the paper and diffuse into the polymer layer.
  • Lightfast color pigments have recently become available on the market which are lightfast and have sufficiently high diffusion rates in the polymer layer even at diffusion temperatures down to 150 ° C. These color pigments therefore do not have to be exposed to extreme temperatures above 200 ° C.
  • the maximum amount of the color transferred from the transfer medium into the polymer layer is also limited for these color pigments using the known method. The maximum value is approximately 4 g of color per m 2 of surface of the polymer layer.
  • the invention has for its object a method of type described at the outset so that the Restrictions on the choice of color pigments largely eliminated and a larger amount of paint can be transferred is.
  • the polymer layer is composed of low molecular weight polymers which are crosslinked after the polymer layer has come into intimate contact with the transfer medium in order to harden the polymer layer. With the new process, the image is already transferred into the not yet hardened polymer layer. It is essential here that the polymer layer does not consist of polymers dissolved in a solvent, but of low molecular weight polymers without the addition of solvents, since a solvent passes into the vapor phase when exposed to heat during the intimate contact of the transfer medium with the polymer layer and makes image transfer impossible would.
  • the polymer layer composed of low molecular weight polymers offers the advantage of a relatively low viscosity even at low temperatures.
  • the viscosity now directly determines the diffusion rate of the color pigments in the polymer layer via the Stokes-Einstein relation, so that the color pigments penetrate far into the polymer layer at relatively low temperatures and in a relatively short time.
  • the absorption capacity of the polymer layer for the color pigments increases, so that the maximum amount of color that can be introduced into the polymer layer is more than 14 g / m 2 .
  • the diffusion of the color pigments is even so rapid that, during normal transfer times, the surface located under the polymer layer can also be colored.
  • Mono- and / or oligomers can be on the surface are applied, the mono- and / or oligomers finally pre-cross-linked to the low molecular weight polymers will.
  • the Polymer layer from the low molecular weight polymers without the Solvents are used. This is in terms of solvents outgoing workplace and environmental pollution a big one Advantage.
  • Temperature 150 ° C When exposed to heat can be used as an upper limit for the Temperature 150 ° C can be selected. A warming up of the Color pigments above this temperature are due to their high Diffusion speed in the polymer layer low molecular weight polymers not necessary. Until the Temperature of 150 ° C is a large number of lightfast Color pigments temperature resistant.
  • the maximum temperature when exposed to heat can even be so be limited that the color pigments do not exceed 100 ° C be warmed up.
  • the color temperature is ultimately on the Diffusion speed of the color pigments in the Polymer layer and that for the transfer of the picture for To coordinate available time.
  • the pre-crosslinking of the monomers or oligomers can be carried out using Irradiation can be carried out with electrons.
  • the Pre-crosslinking of the mono- or oligomers by irradiation with Electrons are advantageously associated with the possibility that Perform pre-crosslinking in a very controlled manner. As a measure of the pre-networking is that of the mono- or Radiation dose absorbed by oligomers is suitable.
  • a radiation dose of 5 to 40 kGy can be advantageous for the Pre-crosslinking of the mono- or oligomers can be used. Basically, the radiation dose is based on the condition of the Starting materials and the desired degree of pre-crosslinking vote.
  • the crosslinking of the low molecular weight polymers can also by means of irradiation with electrons.
  • the Electron beam hardening is also an advantage. With this However, the procedural step would also apply to the application of others To think of curing techniques. When pre-networking the mono- or Oligomers play the advantage of being controllable However, electron beam hardening is extremely large Role. Unless another process is controlled Curing or partial crosslinking of mono- or Oligomers are suitable, but there are no concerns against its application.
  • A can be used for crosslinking the low molecular weight polymers Radiation dose of 40 to 80 kGy can be used. Here are the degree of pre-crosslinking of the polymers and the to take into account the desired final state.
  • the contact pressure when the polymer layer is in intimate contact with the transfer medium can be less than 500 hPa. Already at this low contact pressure can be surprisingly Large quantities of paint can be easily transferred to the polymer layer.
  • a device for the continuous implementation of the new Method with a transport device, one Coating station, a feed device for the Transfer medium, a contact press and a curing station is characterized in that the Curing station is arranged behind the contact press.
  • the curing station has a source for high-energy electrons. It is also convenient a pre-networking station in front of the feeder for the Transfer medium provided. This pre-networking station too can have a source of high energy electrons.
  • there is another one after the contact press and before the Curing station arranged coating station is an advantage.
  • the device is transported by the device Marked presence of a pre-networking station.
  • This device can also, in particular, with regard to sources advantageously designed for high-energy electrons be.
  • the device 1 shown in the figure for the continuous implementation of the method for image transmission has a transport device 1 for chipboard 3.
  • the particle boards 3 are pretreated in a known manner and, for example, veneered, coated with a primer film or lacquer-primed. It is only essential that there is an object with a coatable surface 6, which can also be profiled, ie three-dimensionally equipped.
  • the chipboard 3 In the working direction of the transport device 2, which is indicated by an arrow 4, the chipboard 3 first passes through a coating station 5. In the coating station 5, 3 monomers and oligomers are applied to the surface 6 of the chipboard. These mono- and oligomers are pre-cross-linked in a subsequent pre-cross-linking station 7 by irradiation with electrons.
  • a source for high-energy electrons with a filament 8 and an acceleration path having a cathode 9 and an anode 10 is used.
  • the electrons emerge from the filament 8 and are accelerated between the cathode and the anode by an acceleration voltage of approximately 180 to 300 kV.
  • the acceleration voltage determines the energy of the accelerated electrons and thus their possible penetration depth into the monomers or oligomers applied to the surface 6 of the chipboard. Covering the surface 6 with 400 g / m 2 typically requires an acceleration voltage of 230 to 250 kV so that the electrons penetrate the entire applied layer.
  • the mono- or oligomeric molecular weights applied to the surface 6 have between 500 and 5,000, this results, after the pre-crosslinking station 7, in a polymer layer 11 made of low molecular weight polymers with molecular weights between approximately 50,000 and 100,000.
  • a transfer medium 13 coated with color pigments and coming from a feed device 12 is then drawn onto this polymer layer 11. Together with the transfer medium 13, which is usually a printed paper, the chipboards 3 pass through a double belt press 14.
  • the transfer medium 13 and the polymer layer 11 are brought into intimate contact and heated so that the color pigments are exposed to heat diffuse into the polymer layer.
  • a double belt press is particularly suitable for the new process if the throughput of the area to be printed is very large. However, a double belt press, for example, is not suitable for shaped surfaces 6. Vacuum presses are preferred for printing on shaped, in particular profiled surfaces 6, but their operation is only discontinuous.
  • the transfer medium 13 is again pulled off from the chipboard 3 or the polymer layer 11 by means of a winding station 15. In a last step, the low molecular weight polymers of the polymer layer 11 are then crosslinked. A curing station 16 is provided for this purpose.
  • the curing station 16 has a source for high-energy electrons, which can easily be of identical design.
  • the polymer layer 11 is composed of polymers with molecular weights greater than 1,000,000. This prevents further diffusion of the color pigments in the polymer layer 11 and good surface stability is achieved.
  • the polymer layer 11 has only a low surface stability after the pre-crosslinking station 7 until the curing station 16 has been reached, but this was sufficient for the double belt press 14 to pass through without damage while the image was being transferred from the transfer medium 13.
  • the image quality obtained by the new method on or in the polymer layer 11 on the surface 6 of the chipboard 3 is brilliant. This is due in particular to the possibility of using a large number of color pigments and the transfer of large amounts of color pigments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Printing Methods (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (10)

  1. Procédé de transfert d'un motif sur une surface revêtue, en particulier pour les matériaux en bois.
    au cours duquel la surface (6) est revêtue d'une couche de polymères moléculaires basses sans solvant et durcie par radiation électronique
    au cours duquel la couche de polymères (11) entre en contact intérieur avec un médium de transfert contenant des pigments colorants en la chauffant
    de sorte que les pigments colorants pénétrent la couche de polymères(11) et
    au cours duquel les polymères moléculaires basses entraínent le durcissement de la couche de polymères (11)par radiation électronique après l'entrée en contact intérieur de la couche de polymères (11)avec le médium de transfert,
    de sorte que les pigments colorants soient fixés lors de la liaison des polymères moléculaires basses dans la couche de polymères(11).
  2. Procédé selon la revendication 1, caractérisé par le fait que les mono- et/ou oligomères sont appliquées sur la surface(6), lesquelles sont reliées précédemment aux polymères moléculaires basses.
  3. Procédé selon les revendications 1 et 2, caractérisé par le fait que les pigments colorants ne sont pas chauffés à plus de 15o°C, en particulier pas à plus de 100°C.
  4. Procédé selon la revendication 2, caractérisé par le fait que les mono- ou oligomères sont reliées au préalable par radiation électronique pour une dose de rayons de 5 à 40 kGy.
  5. Procédé selon une des revendications de 1 à 5, caractérisé par le fait que les polymères moléculaires basses sont reniées par radiation électronique pour une dose de rayons de 40 à 80 kGy.
  6. Procédé selon une des revendications de 1 à 5, caractérisé par le fait qu'après le contact intérieur de la couche de polymères (11) avec le médium de transfert (13), mais avant leur liaison, une autre couche de mono-, oligo- et/ou polymères moléculaires basses soit appliquée sur la surface.
  7. Appareil pour l'application du procédé selon les revendications 1 à 6 comprenant un poste de revêtement (5), un poste d'adduction (12), pour le médium de transfert, une presse de contact (14) et un poste de durcissement (16), caractérisé par le fait que le poste de durcissement (16) se trouve derrière la presse de contact (14) et produit une source d'électrons riches en énergie.
  8. Appareil selon la revendication 7, caractérisé par le fait que le poste de durcissement produit une source d'électrons riches en énergie.
  9. Appareil selon les revendications 7 et 8, caractérisé part le fait que le poste de liaison (7) est prévu avant le poste d'adduction (12) pour le médium de transfert (13) et que le poste de liaison produit une autre source d'électrons riches en énergie.
  10. Appareil selon les revendications 7 à 9, caractérisé par le fait qu'un autre poste de revêtement est prévu après le poste de presse de contact et avant le poste de durcissement.
EP92116174A 1991-09-30 1992-09-22 Procédé et appareillage pour le transfert d'image sur des surfaces enduites Expired - Lifetime EP0535504B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4132484A DE4132484C1 (fr) 1991-09-30 1991-09-30
DE4132484 1991-09-30

Publications (2)

Publication Number Publication Date
EP0535504A1 EP0535504A1 (fr) 1993-04-07
EP0535504B1 true EP0535504B1 (fr) 1998-07-15

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ID=6441784

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EP92116174A Expired - Lifetime EP0535504B1 (fr) 1991-09-30 1992-09-22 Procédé et appareillage pour le transfert d'image sur des surfaces enduites

Country Status (4)

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EP (1) EP0535504B1 (fr)
JP (1) JPH06234266A (fr)
AT (1) ATE168328T1 (fr)
DE (2) DE4132484C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6660370B2 (en) 2000-02-02 2003-12-09 Trespa International B.V. Method for making a colored multilayer composite, and colored multilayer composite produced by the method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES1023769Y (es) * 1993-02-22 1994-03-01 Garbayo Marco Perfil perfeccionado utilizado en imprenta y similares.
MY129788A (en) 1996-01-25 2007-04-30 Innovia Films Ltd Printable film.
DE19751115A1 (de) * 1997-11-18 1999-05-20 Cruciger & Steffens Schreinere Siebdruck-Möbel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA752573B (en) * 1975-04-22 1976-04-28 British Industrial Plastics Improvements in or relating to colour printing
DE2940370C2 (de) * 1979-10-05 1985-02-21 Peter 8752 Kleinostheim Müser Anwendung von Methacrylaten als Beschichtung zum Bedrucken von Blechen im Sublimationsdruckverfahren
DE3724719A1 (de) * 1987-07-25 1989-02-02 Nortech Chemie Verfahren zum bedrucken eines substrates nach dem transferdruckverfahren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6660370B2 (en) 2000-02-02 2003-12-09 Trespa International B.V. Method for making a colored multilayer composite, and colored multilayer composite produced by the method

Also Published As

Publication number Publication date
ATE168328T1 (de) 1998-08-15
DE4132484C1 (fr) 1993-02-18
EP0535504A1 (fr) 1993-04-07
JPH06234266A (ja) 1994-08-23
DE59209417D1 (de) 1998-08-20

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